Method of making reinforcing-bars.



PatentedSept. 28, 1915.

E. E. SLICK.

METHOD OF MAKING REINFORCING BARS.

APPLICATION FILED JAN.22. 1914.

EDWIN E. suck, on WESTMONT noRoUGH, PENNSYLVANIA.

METHOD OF MAKING REINFORCING-BARS.

Specification of Letters Patent.

Patented Sept. 28, 1915.

Original application filed August 28, 1913, Serial No. 787,067. Divided and this application filed January 22, 1914. Serial No. 813,627. I

To all whom it may concern:

Be it known that I, EDWIN E. SLICK, a

' citizen of the United States, residing in the borough of Westmont, in the county of Gambria and State of Pennsylvania, (whose post-office address is J ohnstown, Pennsylvania,) have invented certain new and useful Improvements in Methods of Making Reinforcing-Bars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same;

-My invention relates to the method of making a ribbed reinforcing bar, the proj ecting ribs of which are preferably located on opposite sides of a bar of approximately rectangular cross-section, and by reason of this construction, my bar is well adapted to be produced or rolled in a very simple man nor, the finishing pass in the roll being what is known as a box pass, that is, one of approximately rectangular cross-section with two of the sides of the rectangle parallel to the axes of the rolls, with the two other sides approximately at right angles to the roll axes. I prefer to form my bar with ribs on two opposite surfaces thereof and extending longitudinally of the bar in a zigzag or sinuous manner. The direction of the ribs may be curved in general, or they may be formed by a series of straight lines,

or by a combination of straight lines and curves, the general zig-zag efiect, however, being maintained. As viewed in plan with the ribbed surfaces in substantially horizontal planes, one form of my bar may have the'rib on the upper surface extending in a zig aag manner, as described, while the rib on the lower surface may have its apices arranged so that the projection plan view of *my bar would show these two ribs crossing each other at intervals. In another form of my bar the ribs on the opposite surfaces may be parallel with each other as viewed in plan and plan projection, and in still. other forms the position of the ribs with respect to each other in longitudinal location, may be anywhere between these two extremes.

This invention is a division from my a lication filed August 28th, 1913, Serial 0. $87,067. I

Havingthus given a general description of my invention, I will now, in order. to

make the matter more clear, refer to the accompanying drawing forming part of this specification in which like characters refer to like parts.

Figure 1 is a top plan View of one form of my bar showing the upper rib in full lines and the lower rib on the opposite side of the bar by dotted lines. Fig. 2 is a com-.

bined' horizontal longitudinal sectional plan through the body of my bar and a plan view of the top of the same, the left-hand portion of said view being the section showing the lower rib in dotted lines, while the righthand portion of said figure is a top plan View showing the upper rib in full lines. Fig. 1 shows the ribs on opposing sides having their apices staggered and midway bethe line lilllll[ of said figure. Fig. 4 is a transverse crosssectional elevation of the form of bar illustrated in Fig. 2, taken on the line IVIV of said figure. Fig. 5 is a view of the leading pass of the rolls adapted to give the preferred form to my bar preparatory to producing the ribs on the same. The upper portion of said figure shows the top roll in elevation, and the lower portion of the figure shows the bottom roll in vertical longitudinal section, the shape of the roll pass and the configuration of the bar therein being shown in crosssection. Fig. 6 'is a view of a preferred form of finishing pass adapted to complete the manufacture of my'bar in which view the upper roll is shown in side elevation, the lower roll in vertical longitudinal cross-section, and the finished form of bar is shown in the finishing roll pass in transverse section.

Referring now to the numbers of reference on the drawings :-1 indicates my bar in general, 2 the surfaces thereof from which the ribs project, 3-3 are the other or approximately flat surfaces of my bar, while H indicate the corners of the body portion of the bar which in this case are shown as slightly rounded, although I wish it understood that these may be beveled or angular as desired. The projecting rib in general is indicated as 5, the portions of said ribs whlch are straight are indicated as 6, wh1le the apices of the zig-zags are indicated as 7 shown as curves, although these and the section of the bar produced thereby is indicated as 10. I prefer to so form this leading pass that the sides of the bar which contact with the roll collars are slightly convex as indicated at 11, while the other pair of opposing sides of said bar areslightly concave as indicated at 12, these concavities being formed by the beads 13 of the rolls. The rolls 8 and 9 are spaced apart a slight distance as indicated by the parting 1 1. The greatest horizontal dimension of the bar 10 is somewhat greater than the greatest verti cal dimension of the body portion of the finished bar which is indicated as 1 in Fig. 6 and the other figures, the idea of this being to have the bar, as it comes from the leading pass, contain sufficient material to permit it to be compressed and elongated by rolling, and at the same time have the ribs 5 formed thereon.

leading pass are so fashioned and proportioned that when the bar is shaped by conipressive rolling action in the finishing pass, these concavities will become straightened out and form substantially flat surfaces, as shown by the sides 3 of the bar in Fig. 6 and the other illustrations. I also make the cross-sectional area of the bar 10 in the leading pass, greater than that of the finished bar 1, in order to insure that itcontains sufiicient material from which to produce the finished form, but at the sameitime I am careful to so regulate these proportions that the barof the leading pass does not contain any excess'which would form a fin or over flow when finishing.

The bar may be rolled from a billet or bloom in various passes preparatory to entering the leading pass shown in Fig. 5, but as this may be done in any of the varlous manners known in the art, I have not illus-' trated nor described the same. After the blank is formed in the leading pass as shown in Fig. 5, it is given a one-quarter turn on its axis and introduced into the finishing pass shown in Fig. 6 where my bar is given its final shape. 1

Referring now to Fig. 6 the upper roll shown in elevation is indicated as 15 with the side collars thereon as shown, the lower roll is indicated as 16 and the cross-section of the finished bar is indicated as 1. The rolls are provided with grooves 18 which are preferably of blunt triangular or trapezoidal The concavities 12 formed in the sides of the bar. 10 of the.

19 in order to provide a clearance at this place and to allow the concavities 12 of the are formed slightly sloping as indicated at s bar of the leading pass to be forced outwardly by rolling compressive action until they assume the approximately straight surfaces indicated as 3. In order to clearly illustrate this clearance 19 the slopes of the collars have been exaggerated in the draw= ings.

My bar forcing bar for concrete or other primarily plastic materials and has the advantage that it may be produced by a comparatively simple process of rolling in passes which are what is known as box or open grooves in which the rolling compressions are principally in the direction at' right angles -to those surfaces of the rolls which are substantially parallel to the axes thereof.

Although I have shown and described my invention in considerable detail, I do not wish to be limited to the exact and specific details shown and described, but may use such substitutions, modifications or equivalents thereof, as are embraced within the scope of my invention, as pointed out in the claims.

' Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. The method of making a ribbed bar of general rectangular cross-section, which consists in first forming in a box pass a wider bar with slightly concave sides, then axially revolving same about one-quarter turn, then subjecting it to rolling compressive action in 'the direction ofits greater width to form a bar of dimensions-desired and at the same time forming zig-zag ribs on its two' opposite surfaces.

,2. The method of making a ribbed bar by rolling, which consists in forming a blank of greater width and substantially the same thickness, with the ends of its (moss-sectionslightly convex and the sides of the same slightly concave, then compressing said ends toward each other in a box pass and at the same time forming ribs thereon.

3. The method of rolling a ribbed bar, which consists in forming a blank whose cross-section is of greater width than, and

of substantially the same thickness as, the finished bar, the sides of said blank being formed slightly concave, then compressively rolling the same to reduce saidwidth and at the same time form ribs thereon.

is well adapted for use as arein- 4. The method of rolling a ribbed bar in said width and at the same time form zigbox passes, which consists in forming a -zag ribs on two opposite sides thereof. 7 10 blank Whose cross-section is of greater Width In testimony whereof I hereto aifix my than, and of substantially the same thickness signature in the presence of two witnesses.

as the finished bar, the sides of the cross- EDWIN'E. SLICK. section of said blank being slightly concave Witnesses: and the ends thereof slightly convex, then GEO. E. THACKRAY,

compressively rolling the same to reduce A. DIX TITTLE. 

